# Graylog Internal Monjitoring via API

**URL:** <https://community.graylog.org/t/graylog-internal-monjitoring-via-api/10626>\
**Category:** Development\
**Created:** [May 30, 2019, 7:15am UTC](https://community.graylog.org/t/graylog-internal-monjitoring-via-api/10626 "2019-05-30T07:15:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Magneton](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/magneton/32/1609_2.png) [@Magneton](https://community.graylog.org/u/Magneton)\
**Post date:** [May 30, 2019, 7:15am UTC](https://community.graylog.org/t/graylog-internal-monjitoring-via-api/10626/1 "2019-05-30T07:15:41Z")

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Dear All,

I am looking to monitor graylog internal metrics via the api y creating a GUI monitoring app. I want to monitor the following:-

Input , Prcesss and Output buffers  
Journal Utilisation  
JVM heap metrics

I want to recreate the node’s ui which has percentage bar for all of these.

The idea is to alert when they hit certain levels i.e level 1 =50% , level 2 =65%, level 3=80% over a sampling period of time.

I found the following metrics available from the api.

graylog journal utilisation  
/api/system/metrics/org.graylog2.journal.utilization-ratio

Process Buffer

“org.graylog2.shared.buffers.ProcessBuffer.decodeTime”  
“org.graylog2.shared.buffers.ProcessBuffer.incomingMessages”  
“org.graylog2.shared.buffers.ProcessBuffer.parseTime”  
“org.graylog2.shared.buffers.ProcessBuffer.thread-factory.created”  
“org.graylog2.shared.buffers.ProcessBuffer.thread-factory.running”  
“org.graylog2.shared.buffers.ProcessBuffer.thread-factory.terminated”  
“org.graylog2.shared.buffers.processors.ProcessBufferProcessor.filteredOutMessages”  
“org.graylog2.shared.buffers.processors.ProcessBufferProcessor.incomingMessages”  
“org.graylog2.shared.buffers.processors.ProcessBufferProcessor.outgoingMessages”  
“org.graylog2.shared.buffers.processors.ProcessBufferProcessor.processTime”

Output Buffer

“org.graylog2.buffers.OutputBuffer.incomingMessages”  
“org.graylog2.buffers.OutputBuffer.thread-factory.created”  
“org.graylog2.buffers.OutputBuffer.thread-factory.running”  
“org.graylog2.buffers.OutputBuffer.thread-factory.terminated”  
“org.graylog2.buffers.processors.OutputBufferProcessor.executor-service.completed”  
“org.graylog2.buffers.processors.OutputBufferProcessor.executor-service.duration”  
“org.graylog2.buffers.processors.OutputBufferProcessor.executor-service.idle”  
“org.graylog2.buffers.processors.OutputBufferProcessor.executor-service.running”  
“org.graylog2.buffers.processors.OutputBufferProcessor.executor-service.submitted”  
“org.graylog2.buffers.processors.OutputBufferProcessor.incomingMessages”  
“org.graylog2.buffers.processors.OutputBufferProcessor.processTime”

Input Buffer   
“org.graylog2.shared.buffers.InputBufferImpl.incomingMessages”  
“org.graylog2.shared.buffers.InputBufferImpl.thread-factory.created”  
“org.graylog2.shared.buffers.InputBufferImpl.thread-factory.running”  
“org.graylog2.shared.buffers.InputBufferImpl.thread-factory.terminated”

My question is how are the percentage’s calculated for the input, process and output buffers?

Perhaps someone could point me to the code so that i could read it and understand which metrics are being used in the calculation in the web interfaces.

Kind Regards

Jake

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<div class="post-metadata">

**Author:** ![Magneton](https://sea2.discourse-cdn.com/flex016/user_avatar/community.graylog.org/magneton/32/1609_2.png) [@Magneton](https://community.graylog.org/u/Magneton)\
**Post date:** [May 31, 2019, 7:58am UTC](https://community.graylog.org/t/graylog-internal-monjitoring-via-api/10626/2 "2019-05-31T07:58:15Z")

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from [https://github.com/Graylog2/graylog2-server/blob/master/graylog2-web-interface/src/components/nodes/BufferUsage.jsx](https://github.com/Graylog2/graylog2-server/blob/master/graylog2-web-interface/src/components/nodes/BufferUsage.jsx)

progress bars on node page from above using the formula below:

metric = usage/size \*100

“org.graylog2.buffers.input.size”,  
“org.graylog2.buffers.input.usage”,  
“org.graylog2.buffers.output.size”,  
“org.graylog2.buffers.output.usage”,  
“org.graylog2.buffers.process.size”,  
“org.graylog2.buffers.process.usage”,

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/graylog/original/3X/c/7/c7c09c6b5099570133d6502b83f50ba4430de5b6.png) [@system](https://community.graylog.org/u/system)\
**Post date:** [June 14, 2019, 7:58am UTC](https://community.graylog.org/t/graylog-internal-monjitoring-via-api/10626/3 "2019-06-14T07:58:18Z")

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Closed on June 14, 2019, 7:58am UTC

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